FERGUSON, MO - AUGUST 11: A man is arrested during a protest of the shooting death of 18-year-old Michael Brown by a Ferguson police officer, outside Ferguson Police Department Headquarters August 11, 2014 in Ferguson, Missouri. Civil unrest broke out as a result of the shooting of the unarmed black man as crowds looted and burned stores, vandalized vehicles and taunted police officers. Dozens were arrested for various infractions including assault, burglary and theft. (Photo by Michael B. Thomas/Getty Images) Michael B. Thomas Getty Images

FERGUSON, MO - AUGUST 11: Armed St. Louis County Police Officers stand among citizens to keep the peace during a protest of the shooting death of 18-year-old Michael Brown by a Ferguson police officer, outside Ferguson Police Department Headquarters August 11, 2014 in Ferguson, Missouri. Civil unrest broke out as a result of the shooting of the unarmed black man as crowds looted and burned stores, vandalized vehicles and taunted police officers. Dozens were arrested for various infractions including assault, burglary and theft. (Photo by Michael B. Thomas/Getty Images) Michael B. Thomas Getty Images

FERGUSON, MO - AUGUST 11: People gather during a protest of the shooting death of 18-year-old Michael Brown by a Ferguson police officer, outside Ferguson Police Department Headquarters August 11, 2014 in Ferguson, Missouri. Civil unrest broke out as a result of the shooting of the unarmed black man as crowds looted and burned stores, vandalized vehicles and taunted police officers. Dozens were arrested for various infractions including assault, burglary and theft. (Photo by Michael B. Thomas/Getty Images) Michael B. Thomas Getty Images

JENNINGS, MO - AUGUST 11: Lesley McSpadden, mother of slain 18 year-old Michael Brown speaks during a press conference at Jennings Mason Temple Church of God In Christ, on August 11, 2014 in Jennings, Missouri. The fatal shooting by police of the unarmed teen in Ferguson, Missouri has sparked outrage in the community and set off civil unrest including looting and vandalism. (Photo by Michael B. Thomas/Getty Images) Michael B. Thomas Getty Images

FERGUSON, MO - AUGUST 11: A man is arrested during a protest of the shooting death of 18-year-old Michael Brown outside Ferguson Police Department Headquarters August 11, 2014 in Ferguson, Missouri. The fatal shooting by police of the unarmed teen in Ferguson, Missouri has sparked outrage in the community and set off civil unrest including looting and vandalism. (Photo by Michael B. Thomas/Getty Images) Michael B. Thomas Getty Images

FERGUSON, MO - AUGUST 11: With their hands raised, residents gather at a police line as the neighborhood is locked down following skirmishes on August 11, 2014 in Ferguson, Missouri. Police responded with tear gas as residents and their supporters protested the shooting by police of an unarmed black teenager named Michael Brown who was killed Saturday in this suburban St. Louis community. Yesterday 32 arrests were made after protests turned into rioting and looting in Ferguson. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 11: Police force protestors from the business district into nearby neighborhoods on August 11, 2014 in Ferguson, Missouri. Police responded with tear gas and rubber bullets as residents and their supporters protested the shooting by police of an unarmed black teenager named Michael Brown who was killed Saturday in this suburban St. Louis community. Yesterday 32 arrests were made after protests turned into rioting and looting in Ferguson. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 11: Police force protestors from the business district into nearby neighborhoods on August 11, 2014 in Ferguson, Missouri. Police responded with tear gas and rubber bullets as residents and their supporters protested the shooting by police of an unarmed black teenager named Michael Brown who was killed Saturday in this suburban St. Louis community. Yesterday 32 arrests were made after protests turned into rioting and looting in Ferguson. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 11: A police car passes a memorial in the street where 18-year-old Michael Brown was shot by police on Saturday on August 11, 2014 in Ferguson, Missouri. Police responded with tear gas and rubber bullets as residents and their supporters protested the shooting by police of an unarmed black teenager named Michael Brown who was killed Saturday in this suburban St. Louis community. Yesterday 32 arrests were made after protests turned into rioting and looting in Ferguson. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 11: People view a memorial in the street where 18-year-old Michael Brown was shot by police on Saturday on August 11, 2014 in Ferguson, Missouri. Police responded with tear gas and rubber bullets as residents and their supporters protested the shooting by police of an unarmed black teenager named Michael Brown who was killed Saturday in this suburban St. Louis community. Yesterday 32 arrests were made after protests turned into rioting and looting in Ferguson. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 11: Police guard a Quick Trip gas station that was burned yesterday when protests over the killing of 18-year-old Michael Brown turned to riots and looting on August 11, 2014 in Ferguson, Missouri. Police responded with tear gas and rubber bullets as residents and their supporters protested the shooting by police of an unarmed black teenager named Michael Brown who was killed Saturday in this suburban St. Louis community. Yesterday 32 arrests were made after protests turned into rioting and looting in Ferguson. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

ST. LOUIS, MO - AUGUST 12: Civil rights leader Rev. Al Sharpton speaks about the killing of teenager Michael Brown at a press conference held on the steps of the old courthouse on August 12, 2014 in St. Louis, Missouri. Brown was shot and killed by a police officer on Saturday in suburban Ferguson, Missouri. Sharpton and Browns family were calling for order following riots and skirmishes with police over the past two nights in Ferguson by demonstrators angry over the shooting. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

CLAYTON, MO - AUGUST 12: Demonstrators raise their hands and chant "hands up, don't shoot" during a protest over the killing of Michael Brown on August 12, 2014 in Clayton, Missouri. Some reports state that Brown hand his hands in the air when he was shot and killed by a police officer on Saturday in suburban Ferguson, Missouri. Two days of unrest including rioting and looting have followed the shooting in Ferguson. Browns parents have publicly asked for order. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 12: Demonstrators protest the killing of teenager Michael Brown on August 12, 2014 in Ferguson, Missouri. Brown was shot and killed by a police officer on Saturday in the St. Louis suburb of Ferguson. Ferguson has experienced two days of violent protests since the killing but, tonight's protest was peaceful. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police Chief Thomas Jackson fields questions related to the shooting death of teenager Michael Brown during a press conference on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson has experienced three days of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police Chief Thomas Jackson fields questions related to the shooting death of teenager Michael Brown during a press conference on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson has experienced three days of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: A demonstrator, protesting the shooting death of teenager Michael Brown, walks away after being ordered off the street by police on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, has experienced three days of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police watch over demonstrators protest the shooting death of teenager Michael Brown on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, has experienced three days of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: A demonstrator, protesting the shooting death of teenager Michael Brown, stands his ground as police fire tear gas on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Demonstrators, protesting the shooting death of teenager Michael Brown, scramble for cover as police fire tear gas on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Demonstrators, protesting the shooting death of teenager Michael Brown, flee as police shoot tear gas into the crowd of several hundred after someone reportedly threw a bottle at the line of police on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police surround and detain two people in a car on August 13, 2014 in Ferguson, Missouri. Ferguson is experiencing its fourth day of unrest after following the shooting death of teenager Michael Brown on Saturday. Brown was shot and killed by a Ferguson police officer. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: A young woman walks from a corner after police standing near the corner fired tear gas at her on August 13, 2014 in Ferguson, Missouri. Ferguson is experiencing its fourth day of unrest after following the shooting death of teenager Michael Brown on Saturday. Brown, who was not armed was shot and killed by a Ferguson police officer. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: A police officer patrols a business district on August 13, 2014 in Ferguson, Missouri. Ferguson is experiencing its fourth day of unrest after following the shooting death of teenager Michael Brown on Saturday. Brown was shot and killed by a Ferguson police officer. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: An Al Jazeera television crew, covering demonstrators protesting the shooting death of teenager Michael Brown, scramble for cover as police fire tear gas into their reporting position on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Demonstrators protest the shooting death of teenager Michael Brown on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Demonstrators protest the shooting death of teenager Michael Brown on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police stand watch as demonstrators protest the shooting death of teenager Michael Brown on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police stand watch as demonstrators protest the shooting death of teenager Michael Brown on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images

FERGUSON, MO - AUGUST 13: Police stand watch as demonstrators protest the shooting death of teenager Michael Brown on August 13, 2014 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on Saturday. Ferguson, a St. Louis suburb, is experiencing its fourth day of violent protests since the killing. (Photo by Scott Olson/Getty Images) Scott Olson Getty Images